diff options
Diffstat (limited to 'drivers/iommu/dmar.c')
| -rw-r--r-- | drivers/iommu/dmar.c | 15 |
1 files changed, 12 insertions, 3 deletions
diff --git a/drivers/iommu/dmar.c b/drivers/iommu/dmar.c index c4a0235a4fd..17adf1ebcb1 100644 --- a/drivers/iommu/dmar.c +++ b/drivers/iommu/dmar.c @@ -557,13 +557,17 @@ dmar_find_matched_drhd_unit(struct pci_dev *dev) int __init dmar_dev_scope_init(void) { + static int dmar_dev_scope_initialized; struct dmar_drhd_unit *drhd, *drhd_n; int ret = -ENODEV; + if (dmar_dev_scope_initialized) + return dmar_dev_scope_initialized; + list_for_each_entry_safe(drhd, drhd_n, &dmar_drhd_units, list) { ret = dmar_parse_dev(drhd); if (ret) - return ret; + goto fail; } #ifdef CONFIG_DMAR @@ -574,17 +578,22 @@ int __init dmar_dev_scope_init(void) list_for_each_entry_safe(rmrr, rmrr_n, &dmar_rmrr_units, list) { ret = rmrr_parse_dev(rmrr); if (ret) - return ret; + goto fail; } list_for_each_entry_safe(atsr, atsr_n, &dmar_atsr_units, list) { ret = atsr_parse_dev(atsr); if (ret) - return ret; + goto fail; } } #endif + dmar_dev_scope_initialized = 1; + return 0; + +fail: + dmar_dev_scope_initialized = ret; return ret; } |